CN218005168U - Busbar, battery pack and vehicle - Google Patents

Abstract

The utility model discloses a busbar, battery package and vehicle, the busbar includes first connecting portion, second connecting portion and intermediate portion, the intermediate portion connect in first connecting portion with between the second connecting portion, first connecting portion are used for being connected with the high potential end electricity of first electric core, the second connecting portion are used for being connected with the low potential end electricity of second electric core, first connecting portion with the second connecting portion be with the different slice of material of intermediate portion. According to the utility model discloses the busbar, connecting portion and middle part have adopted different materials in this busbar, can synthesize the requirement that satisfies busbar each side, improve the suitability of busbar.

Description

Busbar, battery pack and vehicle

Technical Field

The utility model relates to a battery technology field, in particular to busbar, including the battery package of this busbar and the vehicle including this battery package.

Background

In the battery package, generally can link together a plurality of electric cores through the busbar to realize the connection of a plurality of electric cores, the busbar among the correlation technique can't satisfy structural strength simultaneously and be connected the requirement of reliability with electric core.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a busbar, connecting portion and middle part have adopted different materials in this busbar, can synthesize the requirement that satisfies busbar each side, improve the suitability of busbar.

Another object of the present invention is to provide a battery pack, which includes the above-mentioned bus bar.

A further object of the present invention is to provide a vehicle, which includes the battery pack.

According to the utility model discloses busbar, including first connecting portion, second connecting portion and intermediate portion, the intermediate portion connect in first connecting portion with between the second connecting portion, first connecting portion are used for being connected with the high potential end electricity of first electric core, the second connecting portion are used for being connected with the low potential end electricity of second electric core, first connecting portion with the second connecting portion be with the different slice of material of intermediate portion.

According to the utility model discloses the busbar, connecting portion and middle part have adopted different materials in this busbar, can synthesize the requirement that satisfies busbar each side, improve the suitability of busbar.

In addition, according to the bus bar of the above embodiment of the present invention, the following additional technical features can be provided:

optionally, the first connecting portion and the second connecting portion are both sheet-shaped and have higher structural strength than the intermediate portion.

Optionally, the first connecting portion and the second connecting portion are made of a hexabasic aluminum alloy material, and the middle portion is made of a hexabasic aluminum alloy material.

Optionally, a thickness of at least a portion of the intermediate portion is less than a thickness of the first and second connection portions.

Optionally, the thickness of the middle portion gradually decreases in a direction from both ends to the middle.

Alternatively, the intermediate portion may have an uneven sheet shape in the width direction.

Optionally, the side edges of the middle portion in the width direction are recessed toward the middle portion of the middle portion to form a notch groove.

Optionally, one or more weakening holes are formed in the middle part at intervals.

Optionally, the busbar is integrally formed.

According to the embodiment of the utility model, the battery pack comprises a first battery cell, a second battery cell and a busbar, wherein the first battery cell and the second battery cell are connected in series, and both the first battery cell and the second battery cell comprise a high potential end and a low potential end; the busbar is according to the busbar, the first connecting portion is connected with the high potential end of the first battery cell, and the second connecting portion is connected with the low potential end of the second battery cell.

Optionally, the first connection portion is welded, riveted or screwed to the high potential end of the first cell, and the second connection portion is welded, riveted or screwed to the low potential end of the second cell.

According to the utility model discloses vehicle, include according to aforementioned busbar or include according to aforementioned battery package.

The utility model provides a busbar, battery package and vehicle can couple together through the electric core of busbar in with the battery package, and this busbar has adopted different materials respectively in both ends connecting portion and the middle part about, can guarantee great structural strength in the welding department at both ends, and when preventing the vibration, the welding seam became invalid, guarantees buffering and overcurrent performance at the middle part, carries out different settings to the busbar material, can compatible different demands, improves the suitability of busbar. In addition, through setting up this battery package, can improve the shock resistance of battery package to guarantee vehicle operation's stability and security.

Drawings

Fig. 1 is a schematic view of a bus bar according to an embodiment of the present invention.

Fig. 2 is a schematic view of a busbar according to another embodiment of the present invention.

Fig. 3 is a schematic diagram of a bus bar according to another embodiment of the present invention.

Fig. 4 is a perspective view of a bus bar according to another embodiment of the present invention.

Fig. 5 is a partial schematic view of a battery pack according to an embodiment of the present invention.

Fig. 6 is a partial schematic view of a battery pack according to another embodiment of the present invention.

Reference numerals:

the battery pack 100 includes a first cell 10a, a high potential end 11a of the first cell 10a, a low potential end 12a of the first cell 10a, a second cell 10b, a high potential end 11b of the second cell 10b, a low potential end 12b of the second cell 10b, a busbar 20, a first connection portion 21, a second connection portion 22, an intermediate portion 23, a weakening hole 201, and a notch groove 202.

Detailed Description

Each part of the bus bar in the related art is made of the same material, when the bus bar is actually used, the connecting part in the bus bar needs to be welded with the pole group of the battery cell, so that the bus bar needs to have good welding performance, the middle part of the bus bar needs to buffer the impact on the bus bar, so that the bus bar needs to have good buffering performance, and the bus bar made of the same material is difficult to meet the comprehensive requirements in all aspects in the using process. Therefore, the utility model discloses in provide a busbar, connecting portion and middle part in this busbar adopt different materials preparation respectively, can strengthen the suitability of busbar.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1, the busbar 20 according to the embodiment of the present invention includes a first connection portion 21, a second connection portion 22, and an intermediate portion 23, wherein the first connection portion 21 and the second connection portion 22 can be used for connecting the poles of the battery cells, and the intermediate portion 23 is connected between the first connection portion 21 and the second connection portion 22 for conducting the first connection portion 21 and the second connection portion 22 to realize circuit connection, wherein the first connection portion 21 is used for electrically connecting with the high potential end 11a of the first battery cell 10a, and the second connection portion 22 is used for electrically connecting with the low potential end 12b of the second battery cell 10 b. The first connection portion 21 and the second connection portion 22 are both sheet-shaped and made of a material different from that of the intermediate portion 23.

According to the utility model discloses busbar 20, connecting portion and middle part 23 have adopted different materials among this busbar 20, can set up busbar 20 according to the demand to compatible different demands, and can synthesize the requirement that satisfies busbar 20 each side, improve busbar 20's suitability.

The bus bar 20 can be customized according to different requirements, for example, when the connection strength and the weight reduction requirement of the bus bar 20 are required to be satisfied, the first connecting portion 21 and the second connecting portion 22 can be disposed on the material with the density higher than the intermediate portion 23, and the like, the utility model discloses in mainly having considered the connection strength and the shock resistance of the bus bar 20 comprehensively, the structural strength and the stability of the battery pack 100 with this bus bar 20 are improved, of course, this is not the limitation of the protection scope of the present invention.

In some embodiments of the present invention, the first connecting portion 21 and the second connecting portion 22 are both sheet-shaped and have higher structural strength than the intermediate portion 23. The first connecting portion 21 and the second connecting portion 22 of the busbar 20 are used for connecting the battery cells, and the strength of the first connecting portion 21 and the strength of the second connecting portion 22 are set to be relatively high, so that the stability of connection between the connecting portions and the battery cells can be improved. During the use process, when the bus bar 20 is impacted, the middle portion 23 can be preferentially utilized to absorb energy due to the relatively low structural strength of the middle portion 23, so as to weaken the impact on the battery core and the battery pack 100, and effectively ensure the stability and the structural strength of the battery pack 100.

Alternatively, the first connecting portion 21 and the second connecting portion 22 are six-series aluminum alloy sheets, and the intermediate portion 23 is one-series aluminum alloy sheet. The first connecting portion 21, the second connecting portion 22 and the intermediate portion 23 are made of aluminum alloy, so that the flow conductivity and the structural strength of the bus bar 20 can be ensured, and the corrosion resistance of the bus bar 20 is improved. And first connecting portion and second connecting portion are six and are the aluminum alloy material, have higher structural strength, can improve the structural strength of first connecting portion 21 and second connecting portion 22 to improve the joint strength between busbar 20 and the electric core, and the intermediate part is one and is a series of aluminum alloy material, has better shock-absorbing capacity, when busbar 20 received the impact, can provide shock-absorbing capacity. In addition, the first-series aluminum alloy sheet has higher conductivity than the sixth-series aluminum alloy sheet, and can also improve the energy efficiency of the battery pack 100 and reduce the heat generation amount of the battery pack 100 during use.

The utility model provides a busbar 20 is combined material, and its intermediate portion 23 uses one to be the aluminum alloy, and first connecting portion 21 and second connecting portion 22 use six to be the aluminum alloy, and busbar 20 is used for linking the positive negative pole of two adjacent electric cores, and wherein positive negative pole (anodal post and negative pole post) uses high strength preferentially five to be the aluminum alloy to improve the stability of being connected between connecting portion and the utmost point post, and improved busbar 20's water conservancy diversion ability.

Of course, the first connecting portion 21, the second connecting portion 22, and the intermediate portion 23 in the present invention may be made of other materials.

In addition, in order to further improve the impact resistance of the bus bar 20, the thickness of at least a part of the intermediate portion 23 may be made smaller than the thicknesses of the first connecting portion 21 and the second connecting portion 22. This further facilitates energy absorption by the intermediate portion 23, and thus further effectively improves the structural strength and impact resistance of the bus bar 20.

The thicknesses of the intermediate portion 23 at the respective positions may be the same or different from each other, and when the thicknesses of the intermediate portion 23 are the same, the effective energy absorption of the entire intermediate portion 23 can be ensured, and in addition, the thicknesses of the respective portions of the intermediate portion 23 may be set to be different from each other, so that a predetermined crushing effect is achieved, and the stability of the battery pack 100 is further improved.

In addition, the intermediate portion 23 of the present invention may be configured such that both end edges along the length direction are respectively connected to the first connecting portion 21 and the second connecting portion 22, and the thickness of the intermediate portion 23 is gradually reduced in the direction from both ends to the center. Thus, while the impact resistance of the bus bar 20 is ensured, the structural strength of the bus bar 20 can be ensured, and the problem of stress concentration due to steps or drops between the intermediate portion 23 and the first and second connection portions 21 and 22 can be avoided. The thicknesses of the two ends of the middle portion 23 can be respectively the same as those of the first connecting portion 21 and the second connecting portion 22, so that the surfaces of the first connecting portion 21, the middle portion 23 and the second connecting portion 22 can be smoothly transited, and the problem of stress concentration is reduced.

In addition, in some embodiments of the present invention, the intermediate portion 23 is formed in an uneven sheet shape along the length direction. Therefore, the first connecting portion and the second connecting portion have certain deformation allowance, relative positions of the first connecting portion and the second connecting portion in the direction perpendicular to the bus bar and the length direction of the bus bar are changed, and then height tolerance of two ends of the bus bar and the lug during welding is compensated.

In the present invention, the intermediate portion may have an arch shape, a wave shape, or the like extending in the longitudinal direction.

As shown in fig. 2, in some embodiments of the present invention, the middle portion 23 is connected to the first connecting portion 21 and the second connecting portion 22 along the edges of the two ends in the length direction, and the middle portion 23 is recessed to the middle portion of the middle portion 23 along the side edges in the width direction to form a notch groove 202. This can further weaken the structural strength of the intermediate portion 23, facilitating the crushing of the intermediate portion 23.

In addition, as shown in fig. 4, in some embodiments of the present invention, the middle portion 23 may be further provided in an arc-shaped sheet shape recessed in the thickness direction of the first connecting portion 21 and the second connecting portion 22.

Optionally, as shown in fig. 3, the middle portion 23 is provided with one or a plurality of weakening holes 201 arranged at intervals. By providing the weakening holes 201, the energy absorbing effect of the intermediate portion 23 can be further enhanced. In conjunction with the above embodiment, the intermediate portion 23 may be made of an aluminum alloy material, and the conductivity of the intermediate portion 23 can be maintained by the aluminum alloy material, so that even if the above-described structure of the notch groove 202, the weakening hole 201, and the like is provided, the conductivity of the intermediate portion 23 can be maintained, and the performance of the bus bar 20 can be improved.

Wherein, the bus bar 20 of the present invention is integrally formed. Through integrated into one piece, can improve the structural strength and the shock resistance of busbar 20 effectively, weaken the problem of stress concentration, improve the performance and the life of busbar 20.

In addition, the length direction of the middle bus bar 20 of the present invention can refer to the front-back direction in the drawings, the width direction can refer to the left-right direction in the drawings, and the thickness direction can refer to the up-down direction in the drawings.

As shown in fig. 5 and 6, the battery pack 100 according to an embodiment of the present invention includes a first battery cell 10a, a second battery cell 10b, and a busbar 20, where the first battery cell 10a and the second battery cell 10b are connected in series, and each of the first battery cell 10a and the second battery cell 10b includes a high potential end and a low potential end; the bus bar 20 is the bus bar 20 according to the foregoing, the first connection portion 21 is connected to the high-potential end 11a of the first battery cell 10a, and the second connection portion 22 is connected to the low-potential end 12b of the second battery cell 10 b. Therefore, the first battery cell 10a and the second battery cell 10b can be connected by the bus bar 20, the connecting portion and the middle portion 23 of the bus bar 20 are made of different materials, the bus bar 20 can be set according to requirements to be compatible with different requirements, the requirements of various aspects of the bus bar 20 can be comprehensively met, and the applicability of the bus bar 20 is improved.

In some embodiments of the present invention, the first connection portion 21 is welded, riveted, or screwed to the high-potential end 11a of the first cell 10a, and the second connection portion 22 is welded, riveted, or screwed to the low-potential end 12b of the second cell 10 b. The connection stability between the connection portion and the corresponding battery cell can be improved.

Wherein, the utility model provides a first electric core 10a and second electric core 10b can set up the form into establishing ties each other, and wherein, the high potential end 11a of first electric core 10a is the positive pole of first electric core 10a, and the low potential end 12b of second electric core 10b is the negative pole of second electric core 10 b. In addition, the cells in the battery pack 100 may be connected in the same or different manners, so as to achieve connection between the cells in the battery pack 100.

Wherein, the utility model provides a battery package 100 can include a plurality of range upon range of electric cores, and two electric cores that link to each other pass through busbar 20 and connect, and in addition, battery package 100 can also include each group's range upon range of electric core, and the utensil can utilize aforementioned busbar 20 to connect according to the actual demand between the range upon range of electric core of every group, between the different group's electric core.

According to the utility model discloses the vehicle of embodiment includes according to aforementioned battery package 100. In addition, the utility model discloses still provide a vehicle, this vehicle includes the busbar 20 of the aforementioned embodiment. By providing the aforementioned battery pack 100 or bus bar, the impact resistance of the battery pack 100 can be improved, thereby ensuring the stability and safety of vehicle operation.

According to the utility model provides a busbar, battery package and vehicle can be connected through the electric core of busbar in with the battery package, and different materials have been adopted respectively to both ends connecting portion and middle part about this busbar, can guarantee great structural strength at the welding department at both ends, and in the time of preventing the vibration, the welding seam became invalid, guarantees buffering and overcurrent performance at the middle part, carries out different settings to the busbar material, can compatible different demands, improves the suitability of busbar. In addition, through setting up this battery package, can improve the shock resistance of battery package to guarantee the stability and the security of vehicle operation.

In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A busbar comprising a first connecting portion, a second connecting portion, and an intermediate portion, the intermediate portion being connected between the first connecting portion and the second connecting portion, the first connecting portion being for electrically connecting to a high potential end of a first battery cell, the second connecting portion being for electrically connecting to a low potential end of a second battery cell, the first connecting portion and the second connecting portion each being in a sheet form of a material different from that of the intermediate portion.

2. The busbar according to claim 1, wherein the first and second connecting portions are each sheet-like having a structural strength higher than that of the intermediate portion.

3. The buss bar of claim 2, wherein the first connection portion and the second connection portion are a hexa-aluminum alloy material and the intermediate portion is a one-aluminum alloy material.

4. The busbar according to claim 1, wherein at least a portion of the intermediate portion has a thickness smaller than a thickness of the first connecting portion and/or the second connecting portion, the intermediate portion having a thickness that gradually decreases in a direction from both ends to the middle.

5. The busbar according to any one of claims 1 to 4, wherein the intermediate portion has an uneven sheet shape in a length direction.

6. The busbar according to claim 5, wherein the intermediate portion is recessed to form a cutaway groove from a side edge of the intermediate portion in the width direction toward a middle portion of the intermediate portion.

7. The busbar according to any one of claims 1 to 4, wherein the intermediate portion is provided with one or a plurality of weakening holes arranged at intervals;

and/or the bus bar is integrally formed.

8. A battery pack, comprising:

the battery comprises a first battery cell and a second battery cell which are connected in series, wherein the first battery cell and the second battery cell both comprise a high potential end and a low potential end;

a busbar according to any one of claims 1 to 7, the first connection portion being connected to a high potential end of the first cell, and the second connection portion being connected to a low potential end of the second cell.

9. The battery pack of claim 8, wherein the first connection portion is welded, riveted, or screwed to the high potential end of the first cell, and the second connection portion is welded, riveted, or screwed to the low potential end of the second cell.

10. A vehicle characterized by comprising the bus bar according to any one of claims 1 to 7 or comprising the battery pack according to claim 8 or 9.

Images